Wheel-tire.



Gi w. CRAWFORD.

WHEEL TIRE. APPLICATION FILED JAN-18. 1910.

' Patented Apr. .12, 1910.

' WITNESSES:

INVENTOH I 7 By V mmws

. elevation of one of the split rings forming and State of New Jersey, have inventedcer- .reference numerals designate corresponding members are specially formed for the purenonen w. onawronn, or PERTH AMBoY,

TIRE CQMlPA'NY, A CORPORATION MAINE.

NEW annsnr, AssIGNon T0 was SAFETY WHEEL-TIRE.

To all whom it may concern:

Be it knownthat I, GEORGE W. CRAWFORD,

a citizen of the United States, and a resident of Perth Amboy, county of Middlesex,

tain new and useful Improvements. in Vheel-Tires, of which the following isa specification.

This invention relates to wheel tires. designed and adapted for use on vehicle wheels. a

It is the purpose of the invention to provide a tire in which the shoe shall be supported by an efiicient-and durable form of spring means thus doing away with pneumatic tubes or chambers and the objections incident thereto.

The invention consists of the features hereinafter set forth and shown in the drawings.

In the accompanying drawings forming partof this specification and in which like parts-Figure 1 is a transverse section showing the improved tire attached to the rim of a wheel. Fig. 2 is a similar View showing a modification, Fig. 3 is a side the spring support, such as is shown in Figs 1. Fig. 4. is a similar view of a-split ring in modified form. Referring now to the particularfeatures of the invention as shown in the'drawings, 1 is a shoe of suitable material and made in channel form in cross-section. Its inner margins are "provided with outwardly ex tending flanges 2 and 3. Surrounding these flanges are stiffening rings 4 and 5 riveted to the walls of the shoe. The rim 6 of the wheel is secured by suitable means to the l felly '7 and the shoe is secured to the rim by cleats 8 held in place by bolts 10 passing l through the flanges of the shoe and through l the filler 11 located within the shoe and stir-W l -l rounding the rim 6.

12, '13 and M are three circumferential spring members normally under tension and together forming an interior spring support for the treadof the shoe. These spring pose of distributing the strain upon the l springs when the latterare under compression incldent to their use. For this purpose each spring member comprises a split 1 ring which decreases in cros-section Specification of Letters ratent. Patented Apr. 12, 1910. Application fiieuanu ry 18,1910. Seria1H o.5 38.,-589.

throughsubstantial .ip ortions" of the rings length from anlintennediate'portion to or towardthe ends. 7 'section is preferably in the form of a grad- This decrease in crossas shown in the drawings. 6o

ualtaper, v been found in actual trial that It has where interior circumferential springs are used to support the tread ofv the tire, there is atendency for the spring to break at a point midway. between its ends 1n cases where, the spring is uniform in, cross-sectlon. This tendency 1S overcome by decreasing the cross-section of the ring, as above described, because the, strain upon the ring is thereby distributed. The ends of the split ring may be arranged to overlap, as shown in Fig. 3,, or a space may be left between the ends oft-he split ring as is the case with the split ring 15 shown inFig. 4.

While I prefer to employ three parallel spring'members arranged side by side, as shownin Fig. 1, I do not wish to be limited either to the location of these spring members relative to each other, or to the number of the spring members. If desired, one: spring member maybe used as is shown in Fig. 2. In this case the spring member 1 issubstantially as wide as that of the three combined spring members, shown in Fig. 1.

What is'claimed and what is desired to be secured by Letters Patent is 1. In a wheel-tire, the combination of ashoe; and an interior spring support for the shoe comprising a circumferential spring member normally under tension, said spring member comprising a. split ring which decreases in cross-section through substantial portions of the ringslengthfrom anintermediate portion to or toward the ends, whereby the strain on the ring is distributed.

2. In a wheel-tire, the combination of a shoe, and an interior spring support for the shoe comprising a circumferential spring member normally under tension, said spring member comprising a split ring which decreases cross-section through substantial portions of the rings length from an intermediate portion to or toward the ends, whereby the strain on thering is distributed, said ring having its ends overlapping.

3. In a wheel-tire, the combination of a shoe of channel form in cross-section; a wheel rim to which the shoe, is secured; and an interior spring support for the shoe comprising a circumferential spring member norgradually really under tension, said spring member comprising a split rlng which decreases res-section through substantial portions of t e ringslength from an intermediate porn to oixtoward the ends, whereby the on the ring is distributed. I

i. In a Wheel-tire, the combination of a cc; and an interior spring support for the shoe comprising a circumferential spring member normally under tension, said spring member comprising a split ring which tapers through substantial portions of the rings length from an intern'iediate portion to or toward the ends, whereby the strain on the ring is distributed.

5. In a wheel-tire, the combination of a shoe; and an interior spring support for the shoe comprising a circumferential spring member normally under tension, said spring member comprising a split ring which tapers gradually through substantial portions of the rings length from an intermediate portion toor toward the ends, whereby the strain on the ring isdistributed, said ring having itsends overlapping. I

6; In'a Vehicle Wheel, the combination of a wheel rim; a shoe of channel form in cross-sectionhaving stiifening rings secured l l r I thereto near its inner margins; means for '"ecuring said shoe to said rim; and an intespring support for the shoe comprising 'i'cumt'erential spring member normally tension, said spring member comprisa it split ring which decreases in cross-sec: tron through substantial portions of the "through substantial portions of the rings length from an intermediate portion to or toward the ends, whereby the strain onthe ring is distributed.

In testimony whereof, I have signed my name to this specification, in the presence of two subscrili ing witnesses.

ononen w. CRAWFORD.

Witnesses:

NICHOLAS M. Goonnn'r'r, Jr, IDA GILMORE. 

